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Selective enhancement of surface-state emission and simultaneous quenching of interband transition in white-luminophor CdS nanocrystals using localized plasmon coupling

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Academic year: 2021

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Figure 1. Experimental spectra of optical absorption, optical excitation (at the emission peak 415 nm), and PL (excited at the first exciton peak at 396 nm) of our surface-state emitting CdS NCs in solution
Figure 2. Optical absorption spectra of a 5 nm thick silver nano-island film (dashed line), a 10 nm thick silver nano-island film (dashed–dotted line), and a 20 nm thick silver nano-island film (dotted line) with NC coating, for the demonstration of size-d
Figure 3. Optical absorption spectra of a 10 nm thick silver nano-island film alone (dashed line), after 10 min annealing at 300 ◦ C (dotted line) and with a 60 nm thick coating of CdS SSE NCs in a PMMA polymer matrix (solid line).
Table 1. Systematic comparison of the band-edge and surface-state peak emission wavelengths, the band-edge and surface-state emission peak intensity levels, ratio of the surface-state emission to the band-edge emission, and the total number of photon count
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